001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.camel.component.bean;
018
019import org.apache.camel.Converter;
020import org.apache.camel.Exchange;
021import org.apache.camel.FallbackConverter;
022import org.apache.camel.TypeConverter;
023import org.apache.camel.spi.TypeConverterRegistry;
024
025/**
026 * A set of converter methods for working with beans
027 */
028@Converter
029public final class BeanConverter {
030
031    private BeanConverter() {
032        // Helper Class
033    }
034
035    @FallbackConverter
036    public static Object convertTo(Class<?> type, Exchange exchange, Object value, TypeConverterRegistry registry) {
037        // use a fallback type converter so we can convert the embedded body if the value is BeanInvocation
038        if (BeanInvocation.class.isAssignableFrom(value.getClass())) {
039
040            BeanInvocation bi = (BeanInvocation) value;
041            if (bi.getArgs() == null || bi.getArgs().length != 1) {
042                // not possible to convert at this time as we try to convert the data passed in at first argument
043                return Void.TYPE;
044            }
045
046            Class<?> from = bi.getArgs()[0].getClass();
047            Object body = bi.getArgs()[0];
048
049            // maybe from is already the type we want
050            if (type.isAssignableFrom(from)) {
051                return body;
052            }
053
054            // no then try to lookup a type converter
055            TypeConverter tc = registry.lookup(type, from);
056            if (tc != null) {
057                return tc.convertTo(type, exchange, body);
058            }
059        }
060
061        return null;
062    }
063
064}